| Nederlands | nld-000 |
| vrijblijvend | |
| Deutsch | deu-000 | fakultativ |
| Deutsch | deu-000 | unverbindlich |
| English | eng-000 | noncommittal |
| English | eng-000 | open-ended |
| English | eng-000 | optional |
| English | eng-000 | without obligations |
| Esperanto | epo-000 | nedeviga |
| français | fra-000 | optionnel |
| français | fra-000 | à option |
| Nederlands | nld-000 | facultatief |
| Nederlands | nld-000 | niet verplicht |
| português | por-000 | facultativo |